CN117042161A

CN117042161A - Method, device, user equipment and storage medium for determining transmission time slot

Info

Publication number: CN117042161A
Application number: CN202311011881.2A
Authority: CN
Inventors: 魏兴光; 梁春丽; 郝鹏; 李剑; 李儒岳
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2023-11-10
Also published as: CN111093277A

Abstract

The application provides a BWP switching method, a device and a storage medium, wherein the BWP switching method comprises the following steps: determining at least two BWP of a secondary serving cell of the first communication node, the at least two BWP including the first BWP; and performing BWP switching on the auxiliary service cell according to the received auxiliary service cell dormancy indication, wherein the activated BWP of the auxiliary service cell, of which the auxiliary service cell dormancy indication is the first indication, is the first BWP.

Description

Method, device, user equipment and storage medium for determining transmission time slot

The application relates to a division application of patent application No. 201911090406.2 (the application date of the original application is 2019, 11 and 08, and the application is a BWP switching method, a device and a storage medium).

Technical Field

The present application relates to wireless communication networks, for example, to a method, apparatus, user equipment and storage medium for determining transmission time slots.

Background

The fifth generation mobile communication (5th Generation,5G) system supports a larger system bandwidth than the conventional mobile communication system. For example, the current 5G system supports a maximum system bandwidth of 400MHz, but for a User Equipment (UE), if such a large system bandwidth is to be supported, not only the cost of the UE but also the power consumption of the UE will be increased.

Therefore, a partial Bandwidth (Bandwidth Part) is introduced in the 5G system. BWP is a continuous bandwidth, and the UE does not need to support data transceiving in the whole system bandwidth, but only needs to support data transceiving in the BWP bandwidth. In a 5G system, a plurality of uplink BWP and a plurality of downlink BWP may be configured in the entire system bandwidth, and at the same time, the UE may only have one active uplink BWP and one active downlink BWP, and the configuration on each BWP may be different, so that the UE may dynamically adjust the active BWP according to the traffic situation, thereby saving the power of the UE.

After the BWP mechanism is introduced, a Primary serving cell (PCell) and a Secondary serving cell (SCell) of the UE may use different BWP, respectively, wherein the SCell may be in an inactive state and then transferred from the inactive state to an active state when the use is required. While the switch of SCell from inactive state to active state needs to experience a certain delay (SCell activation delay). The handover delay of the SCell mainly comprises an activation start delay and an activation processing delay, wherein the influence of the activation processing delay is the largest. Therefore, how to determine the BWP switching manner of the SCell is a problem to be solved.

Disclosure of Invention

The application provides a BWP switching method, a device and a storage medium, which are used for carrying out BWP switching of an auxiliary serving cell.

In a first aspect, an embodiment of the present application provides a BWP switching method, including:

determining at least two BWP of a secondary serving cell of the first communication node, the at least two BWP including the first BWP;

and performing BWP switching on the auxiliary service cell according to the received auxiliary service cell dormancy indication, wherein the activated BWP of the auxiliary service cell, of which the auxiliary service cell dormancy indication is the first indication, is the first BWP.

In a second aspect, an embodiment of the present application provides a BWP switching method, including:

at least two BWP types of the secondary serving cell of the first communication node, including the first BWP,

and sending an auxiliary serving cell dormancy indication to the first communication node, wherein the auxiliary serving cell dormancy indication is used for enabling the first communication node to perform BWP switching on the auxiliary serving cell, and the activated BWP of the auxiliary serving cell, of which the auxiliary serving cell dormancy indication is the first indication, is the first BWP.

In a third aspect, an embodiment of the present application provides a user equipment, including: a processor and a memory, the processor being configured to execute program instructions stored in the memory to perform a BWP switching method according to the first aspect

In a fourth aspect, an embodiment of the present application provides a base station, including: comprising a processor and a memory, characterized in that the processor is arranged to execute program instructions stored in the memory for performing the BWP switching method according to the second aspect.

In a fifth aspect, an embodiment of the present application provides a storage medium storing a computer program which, when executed by a processor, implements the BWP switching method according to the first or second aspect.

Drawings

Fig. 1 is a schematic diagram of Scell activation delay;

fig. 2 is a flowchart of a BWP switching method according to an embodiment;

fig. 3 is a switching schematic diagram of a BWP switching method according to an embodiment of the present application;

fig. 4 is a switching schematic diagram of another BWP switching method according to an embodiment of the present application;

fig. 5 is a switching schematic diagram of another BWP switching method according to an embodiment of the present application;

fig. 6 is a switching schematic diagram of another BWP switching method according to an embodiment of the present application;

fig. 7 is a flowchart of another BWP switching method according to an embodiment;

fig. 8 is a frame boundary alignment diagram of a BWP switching method according to the present embodiment;

fig. 9 is a frame boundary alignment diagram of another BWP switching method according to the present embodiment;

Fig. 10 is a frame boundary alignment diagram of another BWP switching method according to the present embodiment;

fig. 11 is a frame boundary alignment diagram of another BWP switching method according to the present embodiment;

fig. 12 is a schematic structural diagram of a UE according to an embodiment;

fig. 13 is a schematic structural diagram of a base station according to an embodiment.

Detailed Description

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

In the current 5G system, each UE configures a maximum of 4 uplink BWP (UL BWP) and 4 downlink BWP (DL BWP) on each carrier. Each UE can only have one active upstream BWP and one active downstream BWP at the same time. The configuration on each BWP may be different, and the UE may activate the BWP according to the dynamic adjustment of the traffic situation. For example, the UE configures 2 downlink BWP: BWP1 bandwidth is large and BWP2 bandwidth is small. When the downlink traffic of the UE is large, the UE may activate BWP1 for downlink traffic transmission; and when the downlink traffic of the UE is small, the UE may switch to BWP2 to save power.

There are three main ways of switching BWP:

1. downlink control information (Downlink Control Information, DCI) is switched, and the UE determines a target uplink BWP and a target downlink BWP for the switching according to the downlink control information DCI format 0_1 for scheduling uplink data and a partial bandwidth indication (Bandwidth part indicator) in the downlink control information DCI format 1_1 for scheduling downlink data.

2. Radio resource control (Radio Resource Control, RRC) information handover, the UE determining a target upstream BWP and a target downstream BWP of the handover according to a first activated upstream BWP identification (first activeuplinkbwp-Id) and a first activated downstream BWP identification (first activedownbwp-Id) in the RRC information;

3. BWP activation timing (BWP inactivity timer) switches, when the UE's BWP inactivity timer times out, the UE switches the downlink BWP to a default downlink BWP, i.e. the downlink BWP corresponding to the defaultDownlinkBWP-Id in the configuration parameters of the serving cell.

For TDD systems, BWP pairs (BWP Pair) are formed due to DL BWP and UL BWP bindings (BWP-index equality). The uplink BWP and downlink BWP center frequency points of the same BWP pair are the same, but the bandwidths and subcarrier spacings may be different, so that once DL BWP is switched, UL BWP is also switched therewith; once UL BWP is switched, DL BWP is also switched.

For the SCell of the UE, when the traffic is relatively small and the PDCCH is not required to be continuously monitored, the BWP of the SCell can be switched to an inactive state, and then activated when the use is required. When the SCell is activated, a certain SCell activation delay (SCell activation delay) exists, and the method mainly comprises the following 2 parts:

activating the starting time delay, namely n to n+k;

Activating treatment time delay, n+k-n+M.

If the UE receives the SCell activation command on slot (slot) n, the UE formally starts the SCell activation procedure on slot n+k and ends the SCell activation procedure on slot where the valid channel state information (Channel State Information, CSI) is reported.

The above k meansk1 is used for indicating a slot where a hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) feedback (PUCCH) corresponding to a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) carrying an SCell activation command is located. The calculation of the k value is based on the subcarrier spacing (Sub-Carrier Space, SCS). Wherein k1 can correspond to the physical layer (L1) processing delay, which is 3ms->About 1ms,3ms corresponds to the medium access control (Media Access Control, MAC) layer (L2) processing delay and RF pre-heat delay, 4ms from LTE>3ms。

To ensure that the time for the UE to activate the SCell after activation of the SCell is no later than n+ [ T ] _HARQ +T _{activation_time} +T _{CSI_Reporting} ]Wherein THARQ means k1, T _{activation_time} Representing MAC-CE resolution delay, RF _warm _up Time delay, AGC adjustment, time frequency offset synchronization and the like, T _{CSI_reporting} Representing the delay of the UE to acquire the CSI-RS, the delay of the CSI-RS processing, the uncertainty delay of acquiring the first CSI report resource, etc. As shown in fig. 1, fig. 1 is a schematic diagram of Scell activation delay.

In the current 5G system, the minimum SCell activation delay is around 12ms, where the time for CSI acquisition is about 8ms. Therefore, the activation performance of the SCell is improved, and mainly the processing delay of the SCell is reduced. At present, a dormant-like sleep behavior (dormant-like sleep) process is proposed, that is, in this state, the UE does not turn off RF on the SCell, which is equivalent to reducing the delay part of the activation process, so as to greatly reduce the activation delay of the SCell. However, there is no clear method for how the SCell performs BWP handover, and the embodiment of the present application provides a method for performing sleep state (Normal) and Normal state (Normal) handover of the SCell on BWP.

Fig. 2 is a flowchart of a BWP switching method according to an embodiment, and as shown in fig. 2, the method according to the embodiment includes the following steps.

Step S1010, determining at least two BWP types of secondary serving cells of the first communication node, wherein the at least two BWP types include the first BWP.

The BWP switching method provided in the present embodiment is applied to a first communication node in a wireless communication system, for example, a UE. In addition, the wireless communication system further includes a second communication node, for example, a base station. UEs in wireless communication systems typically use a battery as a power module, and because of the limited amount of battery power, priority is given to the power saving problem of the UE. In a 5G communication system to which BWP is applied, BWP of the SCell may be in a dormant state without PDCCH interception or with a larger period. And when the UE needs to perform data transmission, the UE may switch from the BWP in the sleep state to the BWP in the other normal state.

In order to implement BWP switching of the first communication node, in the present embodiment, at least two BWP types are defined, wherein the first BWP is included in the two BWP types. The first BWP is a BWP activated by the first communication node in the dormant state, and the first BWP may be a BWP with the smallest power consumption among BWP configured for the first communication node, or a BWP configured exclusively for the dormant state first communication node.

The first BWP includes any one of the following BWP;

the Radio Resource Control (RRC) signals the special BWP configured by the auxiliary serving cell and is special for the dormant state;

the BWP of the secondary serving cell is configured as BWP which does not need PDCCH monitoring;

the PDCCH configured in the BWP of the secondary serving cell monitors the BWP with the longest period;

a channel state information Reference Signal (Channel State Information-Reference Signal, CSI-RS) configured in the BWP of the secondary serving cell transmits the BWP with the longest period;

configuring BWP with minimum bandwidth in BWP of secondary service cell;

default BWP of secondary serving cell;

when the secondary serving cell is not configured with the dedicated dormant BWP, the default BWP of the secondary serving cell, i.e., the BWP corresponding to the configuration parameter defaultDownlinkBWP-Id of the secondary serving cell, is used.

In one embodiment, the second communication node increases a BWP corresponding to the dormant state when configuring parameters of the secondary serving cell, i.e. increases a downlinkbwp-Id parameter in the RRC configuration parameters, which parameter points to a BWP-Id. Other parameters shown are existing except for the dormancydownlinkBWP-Id parameter. When this parameter is not configured (absnt), the first communication node will use default BWP as a functionality BWP. servingCellConfig: =sequence {

……

initialDownlinkBWP BWP-DownlinkDedicated OPTIONAL,--Need M

firstActiveDownlinkBWP-Id BWP-Id

……

defaultDownlinkBWP-Id BWP-Id

dormancyDownlinkBWP-Id BWP-Id

……

}

When the first BWP is any BWP, the first communication node is in a state with lower power consumption, so that the power consumption of the first communication node is saved.

In an embodiment, the at least two BWP further comprise a second BWP, the second BWP being different from the first BWP, and the second BWP at least needs to monitor the physical downlink control channel PDCCH. Or the second BWP is the first active BWP (firstactiondownbwp-Id/firstactionupbwp-Id) of the secondary serving cell. The PDCCH to be monitored may be transmitted on the own secondary serving cell (self-scheduling) or on another serving cell (cross-carrier scheduling).

In an embodiment, the at least two BWP comprises a first BWP and a non-first BWP, wherein the non-first BWP is other BWP than the first BWP.

In step S1020, the secondary serving cell is switched according to the received secondary serving cell dormancy indication, wherein the activated BWP of the secondary serving cell with the secondary serving cell dormancy indication being the first indication is the first BWP.

After configuring at least two BWP, the first communication node may perform BWP handover on the secondary serving cell according to the secondary serving cell dormancy indication sent by the second communication node. The secondary serving cell dormancy indication may be carried in DCI sent by the second communication node, where the DCI is sent on a serving cell in normal BWP, and the first communication node receives DCI on the serving cell in normal BWP, and performs BWP handover according to the received dormancy indication of the secondary serving cell. The secondary serving cell dormancy indication may include a first indication, wherein the secondary serving cell dormancy indication is the first indication, indicating that the active BWP of the secondary serving cell is the first BWP. That is, if the sleep indication received by the first communication node corresponding to a certain secondary serving cell is the first indication, the active BWP of the first communication node on the secondary serving cell should be the first BWP.

In an embodiment, if the at least two BWP comprise a first BWP and a second BWP, the secondary cell is handed over to the first BWP when the sleep indication of the secondary cell is a first indication and the secondary cell is handed over to the second BWP when the sleep indication of the secondary cell is a second indication. The second BWP is another BWP different from the first BWP, and if the BWP currently activated by the first communication node is the first BWP, i.e. the first communication node is in the dormant state, the BWP of the secondary serving cell of the first communication node is switched to the second BWP when the dormant indication of the secondary serving cell is the second indication, which enables the first communication node to quickly switch the normal BWP for subsequent data transmission.

In an embodiment, when the sleep indication of the secondary serving cell is a first indication and the active BWP of the current secondary serving cell is a BWP other than the first BWP, switching to the first BWP, otherwise not switching the BWP; when the sleep indication of the secondary serving cell is the second indication and the active BWP of the current secondary serving cell is the first BWP, switching to the second BWP, otherwise not switching BWP. That is, when the currently activated BWP of the secondary serving cell is a BWP other than the first BWP, when the secondary serving cell dormancy indication of the corresponding secondary serving cell is received as the second indication, handover is not required, and when the received secondary serving cell dormancy indication of the corresponding secondary serving cell is received as the first indication, handover is performed to the first BWP. When the currently activated BWP of the secondary serving cell is the first BWP, when the secondary serving cell dormancy indication of the corresponding secondary serving cell is received as the second indication, the secondary serving cell is switched to the second BWP, and when the received secondary serving cell dormancy indication of the corresponding secondary serving cell is the first indication, the secondary serving cell is not switched.

In an embodiment, the secondary serving cell dormancy indication comprises X bits, each bit being used to indicate BWP handover for one or a group of secondary serving cells. For example, a 0 for each bit indicates a first indication, a 1 indicates a second indication, or vice versa.

In an embodiment, if the at least two BWP comprises a first BWP and a non-first BWP, switching to the target BWP when the sleep indication of the secondary serving cell is the second indication and when the active BWP of the current secondary serving cell is the first BWP, otherwise not switching BWP; when the active BWP of the current secondary serving cell is a BWP outside the first BWP, the BWP is not switched. The non-first BWP is other BWP than the first BWP.

Wherein the target BWP includes any one of the following BWP:

the first communication node is in a secondary serving cell before entering the first BWP;

the first communication node monitors a PDCCH monitoring period and/or a BWP with a shortest CSI-RS sending period in the BWP configured on the auxiliary serving cell;

the first communication node has a BWP with the largest bandwidth in the BWP configured on the secondary serving cell;

a first active BWP of a first communication node on a serving cell;

BWP indicated by BWP index in the downlink control information.

In an embodiment, when the currently activated BWP of the secondary serving cell is the first BWP, when the secondary serving cell dormancy indication of the corresponding secondary serving cell is received as the second indication, the target BWP is switched, and when the received secondary serving cell dormancy indication of the corresponding secondary serving cell is the first indication, the BWP is not switched. When the BWP currently activated by the secondary serving cell is a BWP other than the first BWP, no BWP handover is performed.

According to the BWP switching method provided by the embodiment, at least two BWP of the secondary serving cell of the first communication node is determined, the at least two BWP includes the first BWP, and then BWP switching is performed on the secondary serving cell according to the received secondary serving cell dormancy indication, wherein the secondary serving cell dormancy indication is the activated BWP of the secondary serving cell indicated by the first indication is the first BWP, so that the first communication node can perform BWP switching according to the secondary serving cell dormancy indication.

In an embodiment, the secondary serving cell dormancy indication is included in downlink control information of the scheduling data, where the downlink control information of the scheduling data includes downlink control information of the scheduling downlink data or downlink control information of the scheduling uplink data. That is, extra bits are added to the downlink control information of the scheduling data, which are used to carry the secondary serving cell dormancy indication.

In an embodiment, the secondary serving cell dormancy instruction is included in the downlink control information of the non-scheduled data, and since the downlink control information is divided into two types, i.e., downlink control information (DCI format 0_1) of the scheduled uplink data and downlink control information (DCI format 1_1) of the scheduled downlink data, in order for the first communication node to be able to correctly receive and parse the downlink control information of the non-scheduled data, special configuration is required for the downlink control information of the non-scheduled data.

In an embodiment, the secondary serving cell dormancy indication is included in downlink control information of non-scheduled data, where the downlink control information of non-scheduled data is the same as the length of downlink control information of scheduled downlink data. And configuring new downlink control information of non-scheduling data for the auxiliary service cell dormancy indication, wherein the downlink control information of the non-scheduling data is only used for transmitting the auxiliary service cell dormancy indication, and the length of the downlink control information of the non-scheduling data is the same as that of the downlink control information of the scheduling downlink data.

The downlink control information of the non-scheduled data and the downlink control information of the scheduled downlink data have different format flag bits, and the format flag bits are used for carrying sleep indication of the auxiliary serving cell; or the downlink control information of the non-scheduled data is different from the preset value in the preset control domain of the downlink control information of the scheduled downlink data, and the preset control domain comprises at least one of the following: a coded modulation scheme indication field (Modulation and Coding Scheme, MCS), a new data indication field (New Data Indication, NDI), a redundancy version indication field (Redundancy Version, RV), a process number indication field (ProcessNumber HARQ, HPN), a physical uplink control channel (Physical Uplink Control Channel, PUCCH) resource indication field (PUCCH Resource Indication PRI), a transmission power control indication field (Transmit Power Control, TPC), a time domain resource allocation indication field (TDRA), a frequency domain resource allocation indication Field (FDRA).

In an embodiment, when the value in the preset control field is the first preset value, the downlink control information is indicated to be a DCI dedicated to carrying the sleep indication of the secondary serving cell, and is not used for scheduling downlink data.

In an embodiment, the control domain of the auxiliary serving cell dormancy indication is formed by other control domains except for a preset control domain in the downlink control information of the scheduling downlink data, the size of the control domain is X bits, and the preferential value of X is 15.

In an embodiment, the downlink control information including the secondary serving cell sleep indication and not used for scheduling data includes only the secondary serving cell sleep indication control field with a format flag bit and X bits, and the remaining bits are added bits (padding bits) with the same size as DCI format 1_1.

In an embodiment, the secondary serving cell dormancy indication is included in downlink control information of non-scheduled data, where the downlink control information of non-scheduled data is the same as the downlink control information of scheduled uplink data in length. And configuring new downlink control information of non-scheduling data for the auxiliary service cell dormancy indication, wherein the downlink control information of the non-scheduling data is only used for transmitting the auxiliary service cell dormancy indication, and the length of the downlink control information of the non-scheduling data is the same as that of the downlink control information of the scheduling uplink data. The downlink control information of the non-scheduled data is different from a preset value in a preset control domain of the downlink control information of the scheduled uplink data, and the preset control domain comprises at least one of the following: the uplink shared channel indicates a domain UL-SCH and the channel state information request indicates a domain CSI-Req first communication node st.

In an embodiment, the value of the preset control field is set to a first preset value, preferably UL-sch=0, csi-Req first communication node st=0.

In an embodiment, the control domain of the auxiliary serving cell dormancy indication is formed by other control domains except the preset control domain in the downlink control information of the scheduling uplink data, and the size of the control domain is X bits, and the value of X is preferably 15.

In an embodiment, the downlink control information including the secondary serving cell sleep indication and not used for scheduling data only includes a preset control field and an X-bit secondary serving cell sleep indication control field, and the remaining bits are added bits (padding bits) which ensure that the size of the bits is the same as that of DCI format 0_1.

In an embodiment, the downlink control information carrying the sleep indication of the secondary serving cell is only sent on the allowed primary serving cell; or to allow transmission on the primary and secondary cells.

In an embodiment, when the secondary serving cell dormancy indication is included in the downlink control information of the scheduling data, the control domain corresponding to the secondary serving cell dormancy indication is a newly added control domain in the downlink control information, and the number of bits of the control domain corresponding to the secondary serving cell dormancy indication is determined according to the configured secondary serving cell/cell group number. The mapping relation of the auxiliary service cell/cell group and the bit corresponding to the auxiliary service cell dormancy indication is configured by a high layer.

In an embodiment, performing BWP handover on the secondary serving cell according to the received secondary serving cell dormancy indication includes: and when the auxiliary serving cell dormancy indication is contained in the downlink control information of the scheduling data, performing BWP switching on the auxiliary serving cell according to the auxiliary serving cell dormancy indication, and ignoring the auxiliary serving cell dormancy indication in the downlink control information.

The three cases are divided into three cases:

1. when the secondary cell dormancy indication is included in the downlink control information of the scheduling data and the downlink control information schedules that one secondary cell is to perform data transmission in BWP1 (not the first BWP, indicated by the BWP index control field), and at the same time, the secondary cell/cell group corresponding to the secondary cell dormancy indication control field in the downlink control information includes the secondary cell, the first communication node performs data reception according to the BWP indicated by the BWP index control field and ignores the indication of the secondary cell dormancy indication. As shown in fig. 3, fig. 3 is a switching diagram of a BWP switching method according to an embodiment of the present application, in a control domain for scheduling downlink data transmission, CIF is indicated as SCell 1, BWP indicated by BWP index control domain is indicated as BWP1, and then the indication in SCell sleep indication is ignored.

2. When the secondary serving cell dormancy indication is included in the downlink control information of the scheduling data, and the downlink control information schedules that one secondary serving cell is to perform data transmission in the first BWP (indicated by the BWP index control domain), and at the same time, the secondary serving cell/cell group corresponding to the secondary serving cell dormancy indication control domain in the downlink control information includes the secondary serving cell, the first communication node performs data reception according to the BWP indicated by the BWP index control domain, and ignores the indication of the secondary serving cell dormancy indication. As shown in fig. 4, fig. 4 is a schematic diagram illustrating a handoff method of another BWP handoff method according to an embodiment of the present application, in a control domain for scheduling downlink data transmission, CIF is indicated as SCell1, BWP indicated by BWP index control domain is indicated as first BWP, and then the indication in SCell sleep indication is ignored.

3. When the first communication node receives a downlink control information DCI-1 including an auxiliary serving cell dormancy indication and used for indicating the PCell to perform data transmission and a downlink control information DCI-2 for scheduling the auxiliary serving cell SCell1 to perform data transmission, and the auxiliary serving cell/cell group corresponding to the auxiliary serving cell dormancy indication control domain in the DCI-1 includes the auxiliary serving cell SCell1, the first communication node receives data according to the BWP indicated by the BWP index control domain and ignores the indication of the auxiliary serving cell dormancy indication. (BWP index control domain priority is higher than secondary serving cell sleep indication control domain). As shown in fig. 5, fig. 5 is a schematic diagram of a BWP switching method according to another embodiment of the present application, DCI-1 is downlink control information for scheduling PCell, DCI-2 is downlink control information for scheduling SCell downlink transmission, BWP indicated by BWP index control field in DCI-2 is first BWP, and then the indication in SCell sleep indication in DCI-1 is ignored.

That is, when the downlink control information of the scheduling data received by the first communication node includes the secondary serving cell dormancy indication, and the BWP indicated in the control domain of the scheduling data transmission is inconsistent with the BWP indicated in the secondary serving cell dormancy indication, the first communication node may control the BWP indicated in the control domain of the scheduling data transmission, regardless of whether the control domain of the scheduling data transmission and the secondary serving cell dormancy indication control domain are in the same DCI.

In an embodiment, when each bit of the secondary serving cell dormancy indication corresponds to 1 secondary serving cell, the first communication node does not expect that the BWP indicated by the secondary serving cell dormancy indication is inconsistent with the BWP indicated in the control domain of the scheduled data transmission.

In the above embodiment, when the secondary serving cell dormancy indication is included in the downlink control information of the scheduling data and the scheduled data is limited to the primary serving cell, if the downlink control information for scheduling the secondary serving cell for data transmission and the downlink control information for scheduling the primary serving cell for data transmission are to be guaranteed to be the same in size, assuming that both DCIs are transmitted on the primary serving cell, when the CIF control field of the DCI corresponds to a value of 0 (indicating DCI scheduling primary serving cell), the secondary serving cell dormancy indication control field indicates BWP handover of the secondary serving cell/cell group, and when the CIF control field of the DCI corresponds to a value of more than 0 (indicating DCI scheduling secondary serving cell), the bit corresponding to the secondary serving cell dormancy indication control field is an addition bit (padding bit) and is not used for indicating handover of the secondary serving cell/cell group.

In an embodiment, the secondary serving cell/cell group indicated by the secondary serving cell sleep indication field in the downlink control information to be subjected to BWP handover is handed over to BWP indicated by the BWP index control field in the downlink control information.

As shown in fig. 6, fig. 6 is a schematic handover diagram of another BWP handover method according to an embodiment of the present application, where in downlink control information including scheduling data of secondary serving cell dormancy indication, a secondary serving cell dormancy indication control field includes 4 bits and corresponds to 4 secondary serving cell groups configured in a higher layer, respectively, where it is assumed that SCell Group1 includes SCell1 and SCell2, SCell Group2 includes SCell3 and SCell4, and for this control field of BWP index, a terminal may have the following explanation: (1) indicating BWP where downlink transmission is located; (2) An index indicating a target BWP to which a secondary serving cell to be BWP-handed over is to be handed over in an SCell sleep indication control domain; (3) simultaneously indicating the above-mentioned (1) and (2).

Assuming that the explanation is according to (2) above, the DCI shown in fig. 6 will indicate that secondary serving cells SCell1, SCell2, SCell3 and SCell4 are to be handed over to BWP 1. One premise assumed here is that SCell1, SCell2, SCell3, and SCell4 are all in the first BWP and no BWP handoff is required if these serving cells are in non-BWP.

Fig. 7 is a flowchart of another BWP switching method according to an embodiment, and as shown in fig. 7, the method according to the embodiment includes the following steps.

Step S7010, determining at least two BWP of a secondary serving cell of the first communication node, where the at least two BWP includes the first BWP.

The BWP switching method provided in the present embodiment is applied to the second communication node in the wireless communication system. The first communication node performs BWP handover in the wireless communication system according to the indication information transmitted by the second communication node.

The first BWP includes any one of the following BWP;

configuring BWP with minimum bandwidth in BWP of secondary service cell;

default BWP of secondary serving cell;

Step S7020, a secondary serving cell dormancy indication is sent to the first communication node, where the secondary serving cell dormancy indication is used to enable the first communication node to perform BWP handover on the secondary serving cell, and the activated BWP of the secondary serving cell, where the secondary serving cell dormancy indication is the first indication, is the first BWP.

After configuring at least two BWP, the second communication node may send the secondary serving cell dormancy indication to the first communication node, so that the first communication node performs BWP handover on the secondary serving cell according to the secondary serving cell dormancy indication. The secondary serving cell dormancy indication may be carried in DCI sent by the second communication node, where the DCI is sent on a serving cell in normal BWP, and the first communication node receives DCI on the serving cell in normal BWP, and performs BWP handover according to the received dormancy indication of the secondary serving cell. The secondary serving cell dormancy indication may include a first indication, wherein the secondary serving cell dormancy indication is the first indication, indicating that the active BWP of the secondary serving cell is the first BWP. That is, if the sleep indication received by the first communication node corresponding to a certain secondary serving cell is the first indication, the active BWP of the first communication node on the secondary serving cell should be the first BWP.

In a carrier aggregation scenario, a Primary Cell (PCell) and a Secondary Cell (SCell) require frame boundary alignment. With frame boundary alignment, NR determines the slot where PDSCH scheduled by PDCCH is located according to the following formula,

where n represents a slot index where the first communication node receives the PDCCH, μ _PDSCH Sum mu _PDCCH The Numerology corresponding to PDSCH and PDCCH are shown, respectively. K (K) ₀ Is an offset between PDCCH and PDSCH indicated in DCI, and K ₀ Is calculated based on the Numerology of PDSCH.

Similarly, with frame boundary alignment, NR determines the slot where the PUSCH scheduled by the PDCCH is located according to the following formula,

where n represents a slot index where the first communication node receives the PDCCH, μ _PUSCH Sum mu _PDCCH Numerology corresponding to PUSCH and PDCCH are shown, respectively. K (K) ₂ Is the offset between PDCCH and PUSCH indicated in DCI, and K ₂ Is calculated based on Numerology of PUSCH.

Taking PDSCH scheduling as an example, as shown in fig. 8, fig. 8 is a frame boundary alignment diagram of the BWP switching method according to the present embodiment. Let PDCCH be above slot 2, i.e. n=2, μ _PDSCH ＝0，μ _PDCCH =2, K indicated in dci ₀ =1, then the slot index where the PDSCH is calculated according to the formula is As shown in fig. 7.

Currently in a CA scenario, the frame boundaries of the PCell and SCell may not be aligned, i.e., there may be an integer number of slots offset between the PCell and SCell. The network informs the first communication node of the frame offset between the respective SCell and PCell, and the unit of the offset is based on the SCell and PCellAnd determining all configured uplink and downlink BWP Numerology. Assume that all M (M>0 and M<=4, m is an integer) number of downstream BWP's corresponding Numerology μ _DLBWP,P1 ,μ _DLBWP,P2 ,……,μ _DLBWP,PM ,

All N (N) configured on PCell>0 and N<=4, n is an integer) numerics corresponding to the number of upstream BWP is μ _ULBWP,P1 ,μ _ULBWP,P2 ,……,μ _ULBWP,PN ，

The same assumption is that all X (X >0 and X < =4, X is an integer) corresponding Numerology for the downstream BWP configured on SCell is

μ _DLBWP,S1 ,μ _DLBWP,S2 ,……,μ _DLBWP,SX ,

Numerics corresponding to all Y uplink BWPs configured on SCell are

μ _ULBWP,S1 ,μ _ULBWP,S2 ,……,μ _ULBWP,SY ,

The frame offset count unit of the SCell and the PCell is

[ formula 1]

Under the condition that the frame boundaries of the PCell and the SCell are not aligned, the above formula for determining the slot where the PDSCH or PUSCH scheduled by the PDCCH is located is already inoperable, and the updated formula needs to consider the frame offset μ between the SCell and the PCell _SCell,ref 。

Example 1

The following assumptions are made for the frame offset:

if the SCell aligns with the frame boundary of the PCell, the frame offset is 0;

if the starting point of the frame number 0 of the SCell is later than the starting point of the frame number 0 of the Pcell, the frame offset is greater than 0;

If the start of frame number 0 of SCell is earlier than the start of frame number 0 of PCell, the frame offset is less than 0.

As shown in fig. 9 and 10, fig. 9 is a frame boundary alignment diagram of another BWP switching method according to the present embodiment, and fig. 10 is a frame boundary alignment diagram of another BWP switching method according to the present embodiment.

Let Numerology corresponding to PDCCH be μ _PDCCH Numerology for PDSCH is μ _PDSCH The frame offset between the Cell where the PDCCH is located and the PCell is O _PDCCH And O is _PDCCH Mu _PDCCH,ref Counting in units, wherein the frame offset between the Cell where the PDSCH is positioned and the PCell is O _PDSCH And O is _PDSCH Mu _PDSCH,ref Counting units, wherein the first communication node receives PDCCH on a slot index n, and the slot offset between the PDCCH indicated in the DCI and the PDSCH is K ₀ The slot index where the scheduled PDSCH is located is determined according to the following formula:

wherein mu _PDCCH,ref For the frame offset between the Cell where the PDCCH is located and the PCell, according to [ formula 1 ]]Calculating to obtain; mu (mu) _PDSCH,ref For frame offset between Cell and PCell where PDSCH is located, according to [ equation 1 ]]And (5) calculating to obtain the product.

Similarly, assume Numerology for PDCCH is μ _PDCCH Numerology for PUSCH is μ _PUSCH The frame offset between the Cell where the PDCCH is located and the PCell is O _PDCCH And O is _PCCH Mu _PDCCH,ref Counting in units, wherein the frame offset between the Cell where the PUSCH is and the PCell is O _PUSCH And O is _PUSCH Mu _PUSCH,ref Counting units, wherein the first communication node receives PDCCH on a slot index n, and the slot offset between the PDCCH indicated in the DCI and the PUSCH is K ₂ The slot index where the scheduled PUSCH is located is determined according to the following formula:

wherein mu _PDCCH,ref For the frame offset between the Cell where the PDCCH is located and the PCell, according to [ formula 1 ]]Calculating to obtain; mu (mu) _PUSCH,ref For the frame offset between the Cell where the PUSCH is and the PCell, according to [ equation 1 ]]And (5) calculating to obtain the product.

Taking fig. 11 as an example, fig. 11 is a frame boundary alignment diagram of another BWP switching method according to the present embodiment, and assume that

Numerology for PDCCH is μ _PDCCH =2, frame offset between Cell and PCell where pdcch is located is O _PDCCH =2 and O _PDCCH Mu _PDCCH,ref Counting in the unit of=2, namely the starting point of the frame number 0 of the Cell where the PDCCH is located is 2 mu=2 slots length later than the starting point of the frame number 0 of the PCell;

numerology for pdsch μ _PDSCH =0, the frame offset between Cell and PCell where pdsch is located is O _PDSCH =2 and O _PDSCH Mu _PDSCH,ref Counting in the unit of=1, that is, the start of frame number 0 of the Cell where the PDSCH is located is 2 μ=1 slot length later than the start of frame number 0 of the PCell;

the slot index where the PDCCH is located is n, wherein n=2;

indication of K in DCI ₀ ＝1，

Then the slot index where the PDSCH is located is 1 according to the following formula.

Example 2

The following assumptions are made for the frame offset:

if the starting point of the frame number 0 of the SCell is later than the starting point of the frame number 0 of the Pcell, the frame offset is less than 0;

if the start of frame number 0 of SCell is earlier than the start of frame number 0 of PCell, the frame offset is greater than 0.

Let Numerology corresponding to PDCCH be μ _PDCCH Numerology for PDSCH is μ _PDSCH The frame offset between the Cell where the PDCCH is located and the PCell is O _PDCCH And O is _PDCCH Mu _PDCCH,ref Counting in units of PDSCHThe frame offset between Cell and PCell is O _PDSCH And O is _PDSCH Mu _PDSCH,ref Counting units, wherein the first communication node receives PDCCH on a slot index n, and the slot offset between the PDCCH indicated in the DCI and the PDSCH is K ₀ The slot index where the scheduled PDSCH is located is determined according to the following formula:

Example 3

The newly introduced parameter q is used to indicate the direction of the offset between SCell and PCell. The protocol or system will default to one of the following specifications.

Q=1 if the system is specified as follows;

when the starting point of the frame number 0 of the SCell is later than the starting point of the frame number 0 of the Pcell, the frame offset is greater than 0;

when the starting point of the frame number 0 of the SCell is earlier than the starting point of the frame number 0 of the Pcell, the frame offset is less than 0;

when the start of frame number 0 of SCell is aligned with the start of frame number 0 of Pcell, the frame offset is equal to 0.

If the system is specified as follows, q= -1;

when the starting point of the frame number 0 of the SCell is later than the starting point of the frame number 0 of the Pcell, the frame offset is smaller than 0;

when the starting point of the frame number 0 of the SCell is earlier than the starting point of the frame number 0 of the Pcell, the frame offset is greater than 0;

wherein mu _PDCCH,ref For the frame offset between the Cell where the PDCCH is located and the PCell, according to [ formula 1 ] ]Calculating to obtain; mu (mu) _PUSCH,ref For the frame offset between the Cell where the PUSCH is and the PCell, according to [ equation 1 ]]And (5) calculating to obtain the product.

Example 4

The following assumptions are made for the frame offset:

wherein the method comprises the steps of，μ _PDCCH,ref For the frame offset between the Cell where the PDCCH is located and the PCell, according to [ formula 1 ]]Calculating to obtain; mu (mu) _PDSCH,ref For frame offset between Cell and PCell where PDSCH is located, according to [ equation 1 ]]And (5) calculating to obtain the product.

Example 5

The following assumptions are made for the frame offset:

Example 6

Q=1 if the system is specified as follows;

If the system is specified as follows, q= -1;

Fig. 12 is a schematic structural diagram of a UE according to an embodiment, and as shown in fig. 12, the UE includes a processor 121, a memory 122, a transmitter 123, and a receiver 124; the number of processors 121 in the UE may be one or more, and one processor 121 is taken as an example in fig. 12; a processor 121 and a memory 122 in the UE; may be connected by a bus or other means, for example by a bus connection in fig. 12.

The memory 122 is a computer readable storage medium, and may be configured to store a software program, a computer executable program, and modules, such as program instructions/modules corresponding to the BWP switching method in the embodiment of fig. 2 of the present application. The processor 121 performs at least one function application and data processing of the UE by running software programs, instructions and modules stored in the memory 122, i.e., implements the BWP switching method described above.

The memory 122 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for functions; the storage data area may store data created according to the use of the UE, etc. In addition, memory 122 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device.

The transmitter 123 is a module or combination of devices capable of transmitting radio frequency signals into space, including, for example, a combination of radio frequency transmitters, antennas, and other devices. The receiver 124 is a module or combination of devices capable of receiving a radio frequency signal from space, including, for example, a combination of radio frequency receivers, antennas, and other devices.

Fig. 13 is a schematic structural diagram of a base station according to an embodiment, and as shown in fig. 13, the base station includes a processor 131, a memory 132, a transmitter 133 and a receiver 134; the number of processors 131 in the base station may be one or more, and one processor 131 is taken as an example in fig. 13; a processor 131 and a memory 132 in the base station; may be connected by a bus or otherwise, and is illustrated in fig. 13 as being connected by a bus.

The memory 132 is a computer readable storage medium, and may be configured to store a software program, a computer executable program, and modules, such as program instructions/modules corresponding to the BWP switching method in the embodiment of fig. 7 of the present application. The processor 131 performs at least one function application and data processing of the base station by running software programs, instructions and modules stored in the memory 132, i.e., implements the BWP switching method described above.

The memory 132 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for functions; the storage data area may store data created according to the use of the base station, etc. In addition, memory 132 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device.

The transmitter 133 is a module or combination of devices capable of transmitting radio frequency signals into space, including, for example, a combination of radio frequency transmitters, antennas, and other devices. The receiver 134 is a module or combination of devices capable of receiving a radio frequency signal from space, including, for example, a radio frequency receiver, antenna, and other combinations of devices.

The embodiment of the present application also provides a storage medium containing computer-executable instructions, which when executed by a computer processor, are for performing a BWP switching method, the method comprising: determining at least two BWP of a secondary serving cell of the first communication node, the at least two BWP including the first BWP; and performing BWP switching on the auxiliary service cell according to the received auxiliary service cell dormancy indication, wherein the activated BWP of the auxiliary service cell, of which the auxiliary service cell dormancy indication is the first indication, is the first BWP.

The embodiment of the present application also provides a storage medium containing computer-executable instructions, which when executed by a computer processor, are for performing a BWP switching method, the method comprising: determining at least two BWP of an auxiliary serving cell of the first communication node, wherein the at least two BWP comprises a first BWP, and sending an auxiliary serving cell dormancy indication to the first communication node, wherein the auxiliary serving cell dormancy indication is used for enabling the first communication node to perform BWP handover on the auxiliary serving cell, and the auxiliary serving cell dormancy indication is that the active BWP of the first indicated auxiliary serving cell is the first BWP.

The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application.

It will be appreciated by those skilled in the art that the term user terminal encompasses any suitable type of wireless user equipment, such as a mobile telephone, a portable data processing device, a portable web browser or a car mobile station.

In general, the various embodiments of the application may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the application is not limited thereto.

Embodiments of the application may be implemented by a data processor of a mobile device executing computer program instructions, e.g. in a processor entity, either in hardware, or in a combination of software and hardware. The computer program instructions may be assembly instructions, instruction set architecture ((Instruction Set Architecture, ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages.

The block diagrams of any of the logic flows in the figures of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on a memory. The Memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), optical storage devices and systems (digital versatile disks (Digital Video Disc, DVD) or Compact Discs (CDs)), etc., the computer readable medium may comprise a non-transitory storage medium, the data processor may be of any type suitable to the local technical environment, such as, but not limited to, a general purpose computer, a special purpose computer, a microprocessor, a digital signal processor (Digital Signal Processing, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a programmable logic device (Field-Programmable Gate Array, FGPA), and a processor based on a multi-core processor architecture.

Claims

1. A method of determining a transmission time slot, comprising:

the method comprises the steps that User Equipment (UE) receives a Physical Downlink Control Channel (PDCCH) on a first cell, and the PDCCH schedules a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) of a second cell;

the UE determines a time slot where a PDSCH or a PUSCH scheduled by a PDCCH is located according to the frame offset of the first cell and the frame offset of the second cell;

the UE receives PDSCH or transmits PUSCH on the slot of the second cell.

2. The method of claim 1, wherein the time slot in which the PDSCH scheduled by the PDCCH is located is determined according to the following equation:

wherein n is the index of the time slot where the PDCCH is located on the first cell; k (K) ₀ A slot offset between PDCCH and PDSCH; mu (mu) _PDCCH A parameter set Numerology corresponding to the PDCCH; mu (mu) _PDSCH Numerology corresponding to PDSCH; o (O) _PDCCH For frame offset of first cell, mu _PDCCH，ref Is O _PDCCH Is a count unit of (a); o (O) _PDSCH For frame offset of second cell, mu _PDSCH，ref Is O _PDSCH Is a unit of count of (a).

3. The method of claim 2, wherein the μ is _PDCCH，ref A maximum value between a minimum numerics determined according to numerics of the first cell and a minimum numerics determined according to numerics of the primary serving cell;

Said mu _PDSCH，ref Is the maximum between the minimum numevirology determined from the numevirology of the second cell and the minimum numevirology determined from the numevirology of the primary serving cell.

4. The method of claim 1, wherein the time slot in which the PUSCH scheduled by the PDCCH is located is determined according to the following equation:

wherein n is the index of the time slot where the PDCCH is located on the first cell; k (K) ₂ A time slot offset between PDCCH and PUSCH; mu (mu) _PDCCH A parameter set Numerology corresponding to the PDCCH; mu (mu) _PUSCH Numerology corresponding to the PUSCH; o (O) _PDCCH For frame offset of first cell, mu _PDCCH，ref Is O _PDCCH Is a count unit of (a); o (O) _PUSCH For frame offset of second cell, mu _PUSCH，ref Is O _PUSCH Is a unit of count of (a).

5. The method of claim 4, wherein the μ is _PDCCH，ref A maximum value between a minimum numerics determined according to numerics of the first cell and a minimum numerics determined according to numerics of the primary serving cell;

said mu _PUSCH，ref Is the maximum between the minimum numevirology determined from the numevirology of the second cell and the minimum numevirology determined from the numevirology of the primary serving cell.

6. An apparatus for determining a transmission time slot, characterized in that,

the device for determining the transmission time slot receives a Physical Downlink Control Channel (PDCCH) on a first cell, and the PDCCH schedules a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) of a second cell;

The device for determining the transmission time slot determines the time slot where the PDSCH or the PUSCH scheduled by the PDCCH is located according to the frame offset of the first cell and the frame offset of the second cell;

the means for determining a transmission slot receives PDSCH or transmits PUSCH on the slot of the second cell.

7. The apparatus of claim 6, wherein the time slot in which the PDSCH scheduled by the PDCCH is located is determined according to the following equation:

8. The apparatus of claim 6, wherein the time slot in which the PUSCH scheduled by the PDCCH is located is determined according to the following equation:

9. A user equipment, comprising: a processor and a memory, characterized in that the processor is adapted to execute program instructions stored in the memory for performing the method of determining transmission time slots according to any of claims 1-5.

10. A storage medium storing a computer program which, when executed by a processor, implements the method of determining transmission slots according to any of claims 1-5.